Abstract
We have investigated the influence of fer (Fe) doping on the magneto-electrical properties of polycrystalline samples La0.62Er0.05Ba0.33FexMn1−xO3 (x=0.00, 0.10 and 0.15), prepared through conventional solid state ceramics route. Comparison of experimental data with the theoretical models shows that in the metal–ferromagnetic region, the electrical behavior of the three samples is quite well described by a theory based on electron–phonon, electron–electron, electron–magnon and Kondo-like spin dependent scattering. For the high temperature paramagnetic insulating regime, the adiabatic small polaron hopping (SPH) model is found to fit well the experimental curves.
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